import FileApiDriverJoplinServer from './file-api-driver-joplinServer';
import Setting from './models/Setting';
import Synchronizer from './Synchronizer';
import { _ } from './locale';
import JoplinServerApi, { Session } from './JoplinServerApi';
import BaseSyncTarget from './BaseSyncTarget';
import { FileApi } from './file-api';
import Logger from '@joplin/utils/Logger';

const staticLogger = Logger.create('SyncTargetJoplinServer');

export interface FileApiOptions {
	path(): string;
	userContentPath(): string;
	username(): string;
	password(): string;
}

export async function newFileApi(id: number, options: FileApiOptions) {
	const apiOptions = {
		baseUrl: () => options.path(),
		userContentBaseUrl: () => options.userContentPath(),
		username: () => options.username(),
		password: () => options.password(),
		session: (): Session => null,
		env: Setting.value('env'),
	};

	const api = new JoplinServerApi(apiOptions);
	const driver = new FileApiDriverJoplinServer(api);
	const fileApi = new FileApi('', driver);
	fileApi.setSyncTargetId(id);
	await fileApi.initialize();
	return fileApi;
}

export async function initFileApi(syncTargetId: number, logger: Logger, options: FileApiOptions) {
	const fileApi = await newFileApi(syncTargetId, options);
	fileApi.setLogger(logger);
	return fileApi;
}

export default class SyncTargetJoplinServer extends BaseSyncTarget {

	public static id() {
		return 9;
	}

	public static supportsConfigCheck() {
		return true;
	}

	public static targetName() {
		return 'joplinServer';
	}

	public static description() {
		return 'Besides synchronisation and improved performances, Joplin Server also gives access to Joplin-specific sharing features.';
	}

	public static label() {
		return _('Joplin Server');
	}

	public async isAuthenticated() {
		return true;
	}

	public static requiresPassword() {
		return true;
	}

	public static override supportsShare(): boolean {
		return true;
	}

	public async fileApi(): Promise<FileApi> {
		return super.fileApi();
	}

	public static async checkConfig(options: FileApiOptions, syncTargetId: number = null, fileApi: FileApi|null = null) {
		const output = {
			ok: false,
			errorMessage: '',
		};

		syncTargetId = syncTargetId === null ? this.id() : syncTargetId;

		if (!fileApi) {
			try {
				fileApi = await newFileApi(syncTargetId, options);
			} catch (error) {
				// If there's an error it's probably an application error, but we
				// can't proceed anyway, so exit.
				output.errorMessage = error.message;
				if (error.code) output.errorMessage += ` (Code ${error.code})`;
				return output;
			}
		}

		const previousRequestRepeatCount = fileApi.requestRepeatCount_;
		fileApi.requestRepeatCount_ = 0;

		try {
			// First we try to fetch info.json. It may not be present if it's a new
			// sync target but otherwise, if it is, and it's valid, we know the
			// credentials are valid. We do this test first because it will work
			// even if account upload is disabled. And we need such account to
			// successfully login so that they can fix it by deleting extraneous
			// notes or resources.
			try {
				const r = await fileApi.get('info.json');
				if (r) {
					const parsed = JSON.parse(r);
					if (parsed) {
						output.ok = true;
						return output;
					}
				}
			} catch (error) {
				// Ignore because we'll use the next test to check for sure if it
				// works or not.
				staticLogger.warn('Could not fetch or parse info.json:', error);
			}

			// This is a more generic test, which writes a file and tries to read it
			// back.
			try {
				await fileApi.put('testing.txt', 'testing');
				const result = await fileApi.get('testing.txt');
				if (result !== 'testing') throw new Error(`Could not access data on server "${options.path()}"`);
				await fileApi.delete('testing.txt');
				output.ok = true;
			} catch (error) {
				output.errorMessage = error.message;
				if (error.code) output.errorMessage += ` (Code ${error.code})`;
			}
		} finally {
			fileApi.requestRepeatCount_ = previousRequestRepeatCount;
		}

		return output;
	}

	protected async initFileApi() {
		return initFileApi(SyncTargetJoplinServer.id(), this.logger(), {
			path: () => Setting.value('sync.9.path'),
			userContentPath: () => Setting.value('sync.9.userContentPath'),
			username: () => Setting.value('sync.9.username'),
			password: () => Setting.value('sync.9.password'),
		});
	}

	protected async initSynchronizer() {
		return new Synchronizer(this.db(), await this.fileApi(), Setting.value('appType'));
	}
}
